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MeDetectTarget.cmake
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MeDetectTarget.cmake
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# Detect the target host configurations.
#
# One of the following variables of the detected target arch will be set:
# - <PREFIX>_ARCH_ARM
# - <PREFIX>_ARCH_ARM64
# - <PREFIX>_ARCH_X86
# - <PREFIX>_ARCH_X86_64
#
# Some of the following variables of the detected target os will be set:
# - <PREFIX>_OS_ANDROID
# - <PREFIX>_OS_LINUX
# - <PREFIX>_OS_UNIX
# - <PREFIX>_OS_CYGWIN
# - <PREFIX>_OS_WIN
# - <PREFIX>_OS_DARWIN
# - <PREFIX>_OS_IOS
# - <PREFIX>_OS_MAC
#
# Some of the following variables of the detected stdlib os will be set:
# - <PREFIX>_USE_LIBSTDCXX
# - <PREFIX>_USE_LIBCXX
# - <PREFIX>_USE_MSVC
# - <PREFIX>_USE_GLIBC
# - <PREFIX>_USE_BIONIC
#
# A string of the target triplets will be set to the following variable:
# - <PREFIX>_TRIPLE
#
# See:
# - https://sourceforge.net/p/predef/wiki/Architectures/
# - https://abseil.io/docs/cpp/platforms/macros
function(me_detect_target PREFIX)
if(${PREFIX}_TRIPLE OR CMAKE_SCRIPT_MODE_FILE)
return()
endif()
include(CheckCSourceCompiles)
include(CheckCXXSourceCompiles)
unset(ARCH_ARM)
check_c_source_compiles(
"
#if defined(__arm__) || defined(_M_ARM)
int main() {}
#endif
"
ARCH_ARM
)
unset(ARCH_ARM64)
check_c_source_compiles(
"
#if defined(__aarch64__)
int main() {}
#endif
"
ARCH_ARM64
)
unset(ARCH_X86)
check_c_source_compiles(
"
#if defined(__i386__) || defined(_M_IX86)
int main() {}
#endif
"
ARCH_X86
)
unset(ARCH_X86_64)
check_c_source_compiles(
"
#if defined(__x86_64__) || defined(_M_X64)
int main() {}
#endif
"
ARCH_X86_64
)
unset(OS_ANDROID)
check_c_source_compiles(
"
#if defined(__ANDROID__)
int main() {}
#endif
"
OS_ANDROID
)
unset(OS_LINUX)
check_c_source_compiles(
"
#if defined(__linux__)
int main() {}
#endif
"
OS_LINUX
)
unset(OS_UNIX)
check_c_source_compiles(
"
#if defined(__unix__)
int main() {}
#endif
"
OS_UNIX
)
unset(OS_CYGWIN)
check_c_source_compiles(
"
#if defined(__CYGWIN__)
int main() {}
#endif
"
OS_CYGWIN
)
unset(OS_WIN)
check_c_source_compiles(
"
#if defined(_WIN32)
int main() {}
#endif
"
OS_WIN
)
unset(OS_DARWIN)
check_c_source_compiles(
"
#if defined(__APPLE__)
int main() {}
#endif
"
OS_DARWIN
)
unset(OS_IOS)
check_c_source_compiles(
"
#if defined(__APPLE__)
#include <TargetConditionals.h>
#if TARGET_OS_IPHONE
int main() {}
#endif
#endif
"
OS_IOS
)
unset(OS_MAC)
check_c_source_compiles(
"
#if defined(__APPLE__)
#include <TargetConditionals.h>
#if TARGET_OS_MAC
int main() {}
#endif
#endif
"
OS_MAC
)
unset(USE_LIBSTDCXX)
check_cxx_source_compiles(
"
#include <cstdlib>
#if defined(__GLIBCXX__)
int main() {}
#endif
"
USE_LIBSTDCXX
)
unset(USE_LIBCXX)
check_cxx_source_compiles(
"
#include <cstdlib>
#if defined(_LIBCPP_VERSION)
int main() {}
#endif
"
USE_LIBCXX
)
unset(USE_MSVC)
check_c_source_compiles(
"
#include <cstdlib>
#if defined(_MSC_VER)
int main() {}
#endif
"
USE_MSVC
)
unset(USE_GLIBC)
check_c_source_compiles(
"
#include <stdlib.h>
#if defined(__GLIBC__)
int main() {}
#endif
"
USE_GLIBC
)
unset(USE_BIONIC)
check_c_source_compiles(
"
#include <stdlib.h>
#if defined(__BIONIC__)
int main() {}
#endif
"
USE_BIONIC
)
option(ME_FORCE_64BIT "" ON)
if(ARCH_ARM AND ARCH_ARM64)
if(ME_FORCE_64BIT)
add_compile_options(-arch arm64)
set(ARCH_ARM OFF)
else()
add_compile_options(-arch armv7)
set(ARCH_ARM64 OFF)
endif()
endif()
if(ARCH_X86 AND ARCH_X86_64)
if(ME_FORCE_64BIT)
add_compile_options(-arch x86_64)
set(ARCH_X86 OFF)
else()
add_compile_options(-arch i386)
set(ARCH_X86_64 OFF)
endif()
endif()
unset(TRIPLE)
if(ARCH_ARM)
if(TRIPLE)
message(FATAL_ERROR "Unsupported target")
elseif(OS_ANDROID)
set(TRIPLE armv7-linux-androideabi)
elseif(OS_IOS)
set(TRIPLE armv7-apple-darwin)
else()
message(FATAL_ERROR "Unsupported target")
endif()
endif()
if(ARCH_ARM64)
if(TRIPLE)
message(FATAL_ERROR "Unsupported target")
elseif(OS_DARWIN)
set(TRIPLE aarch64-apple-darwin)
elseif(OS_ANDROID)
set(TRIPLE aarch64-linux-android)
elseif(OS_LINUX)
set(TRIPLE aarch64-linux-gnu)
else()
message(FATAL_ERROR "Unsupported target")
endif()
endif()
if(ARCH_X86)
if(TRIPLE)
message(FATAL_ERROR "Unsupported target")
elseif(OS_ANDROID)
set(TRIPLE i686-linux-android)
elseif(OS_DARWIN)
set(TRIPLE i386-apple-darwin)
elseif(OS_CYGWIN)
set(TRIPLE i686-pc-cygwin)
elseif(OS_LINUX)
set(TRIPLE i386-linux-gnu)
else()
message(FATAL_ERROR "Unsupported target")
endif()
endif()
if(ARCH_X86_64)
if(TRIPLE)
message(FATAL_ERROR "Unsupported target")
elseif(OS_ANDROID)
set(TRIPLE x86_64-linux-android)
elseif(OS_DARWIN)
set(TRIPLE x86_64-apple-darwin)
elseif(OS_CYGWIN)
set(TRIPLE x86_64-pc-cygwin)
elseif(OS_LINUX)
set(TRIPLE x86_64-linux-gnu)
endif()
endif()
if(NOT TRIPLE)
message(FATAL_ERROR "Unsupported target")
endif()
set(${PREFIX}_ARCH_ARM ${ARCH_ARM} CACHE BOOL "")
set(${PREFIX}_ARCH_ARM64 ${ARCH_ARM64} CACHE BOOL "")
set(${PREFIX}_ARCH_X86 ${ARCH_X86} CACHE BOOL "")
set(${PREFIX}_ARCH_X86_64 ${ARCH_X86_64} CACHE BOOL "")
set(${PREFIX}_OS_ANDROID ${OS_ANDROID} CACHE BOOL "")
set(${PREFIX}_OS_LINUX ${OS_LINUX} CACHE BOOL "")
set(${PREFIX}_OS_UNIX ${OS_UNIX} CACHE BOOL "")
set(${PREFIX}_OS_CYGWIN ${OS_CYGWIN} CACHE BOOL "")
set(${PREFIX}_OS_WIN ${OS_WIN} CACHE BOOL "")
set(${PREFIX}_OS_DARWIN ${OS_DARWIN} CACHE BOOL "")
set(${PREFIX}_OS_IOS ${OS_IOS} CACHE BOOL "")
set(${PREFIX}_OS_MAC ${OS_MAC} CACHE BOOL "")
set(${PREFIX}_TRIPLE ${TRIPLE} CACHE STRING "")
set(${PREFIX}_USE_LIBSTDCXX ${USE_LIBSTDCXX} CACHE STRING "")
set(${PREFIX}_USE_LIBCXX ${USE_LIBCXX} CACHE STRING "")
set(${PREFIX}_USE_MSVC ${USE_MSVC} CACHE STRING "")
set(${PREFIX}_USE_GLIBC ${USE_GLIBC} CACHE STRING "")
set(${PREFIX}_USE_BIONIC ${USE_BIONIC} CACHE STRING "")
message(STATUS "Target: ${${PREFIX}_TRIPLE}")
endfunction(me_detect_target)